we have some sections of the admin menu that lead to landing pages that list everything in that section. On pages like /admin and /admin/config this is particularly useful. But if there were only a single link on that landing page, it could be frustrating to click there, then need to click a level deeper immediately.
Search, for example, has only a single sub-page in core.

Content has only a single sub-page in core.

Administration also has only a single sub-page in core.

I'm not sure how hard it would be to do, but I would love it if when there is only a single sub-item it went directly to that section.
Recent comments
Thank you both for your suggestions. Yeah, I'll give TinyMCE a try... better than trying to fight that behemoth CKEditor 5. The TinyMCE page says it can "co-exist with CKEditor" which is...
Specific tags to work in CKEditor 5
The specific tags I need are "<ruby>" and "<rt>" Wow, yeah, that's a pain with CKEditor5. A custom plugin, for sure, but no clue, what the code has to look like...
Specific tags to work in CKEditor 5
I think maybe the problem is with CKEditor stripping the tags - it can be more aggressive than what you would expect from the text format settings. I copied your examples into an example page...
Specific tags to work in CKEditor 5